Prehistoric pronghorns

species of mammal (fossil)

Ilingoceros is an extinct genus of pronghorn artiodactyl from the Late Miocene of North America.

Osbornoceros is an extinct artiodactyl genus of the family Antilocapridae. All antilocaprid species are extinct except for the pronghorn. Osbornoceros osborni is the only known species of the genus Osbornoceros. Osbornoceros lived during the Late Miocene around 7 to 6 million years ago in what is now North America. It is well represented in fossil discoveries, with nearly a dozen specimens having been found to date. All come from the Chamita Formation in a quarry near Lyden, New Mexico, the site of numerous other finds such as that of Chamitataxus, a prehistoric badger that lived at the same t

Hayoceros is an extinct genus of the artiodactyl family Antilocapridae, endemic to North America during the Pleistocene epoch (1.8 mya—300,000 years ago), existing for about 1.5 million years.

left|thumb|Horn cores of T. schuleri, American Museum of Natural History Tetrameryx is an extinct genus of the North American artiodactyl family Antilocapridae, known from Mexico, the western United States, and Saskatchewan in Canada.

Merriamoceros is an extinct genus of pronghorn. It is known from a single species, which is also the type species, M. coronatus.

Merycodus is an extinct genus of the artiodactyl family Antilocapridae. Fossils of this genus have been found in the Santa Fe Group of New Mexico.

Capromeryx (dwarf pronghorn) is an extinct genus of dwarf pronghorns (Antilocapridae) that originated in North America during the Pliocene about 5 million years ago (the exact range of their presence on the landscape is still not known, but the most recent fossils found are dated to 11,000 years ago). Antilocaprines began to decline in diversity during the Late Miocene, and the closest living relative and only surviving antilocaprine is the North American pronghorn (Antilocapra americana).

thumb|left|Restoration of Ramoceros and Cosoryx Cosoryx is an extinct genus of antilocaprid that lived in the Miocene of Nevada. Fossils of this genus have also been found in the Santa Fe Group in New Mexico.